The central air conditioner is composed of many factors, many equipments and many partial systems, which are closely connected. Here are some common knowledge about fan coil unit selection, installation and system design, which everyone needs to know.
1. Fan coil unit selection must adhere to rather big than small, selection based on air volume and cooling load, select the maximum value, don't think less people, use less time,so to choose a smaller fan coil unit, so not only can't achieve energy saving, but also more electricity.
When selecting fan coil units, users need to be asked if there is any fresh air demand. The demand for fresh air and the demand for no fresh air have great influence on the selection of fan coil unit.
2. Fan coil unit installation, mainly divided into two parts, fan coil outdoor unit installation and indoor fan coil unit installation
(1) The installation position of the outdoor unit is very simple, to ensure the reliability of the bearing capacity of the foundation, and the location needs good ventilation.  If the heat dissipation of the host is good, the working efficiency will also be improved.
(2) Pay attention not to place the fan coil unit at the top of the kitchen and toilet, and never choose to return air in these two places;
(3) Pay attention not to forget to reserve access when installing fan coil units;
3. Fan coil unit system design considerations
(1) The locations of air outlets and air supply outlets can be selected according to the indoor structure, but the design and spacing between air outlets shall strictly comply with the standard requirements, otherwise the return air will be short-circuited and normal air supply will be affected;
(2) The fan coil unit air supply outlet selection, don't think that the larger the air outlet, the larger the air supply volume, the better, if the fan coil unit air supply outlet and the system air supply outlet size does not match, will also have a great bad impact.
These are all the places that are especially prone to make mistakes in the selection, installation and system design of fan coil unit. Any carelessness will affect the working efficiency of fan coil units.